Hi Peter,
It will take some "adjusting" for your kids to get really stable on the Starsurer S, but since they are kids. they should adapt very quickly.
At < 90 lbs, I&#39;m sure they can progress, if you get them a good powerful rig that they can plane with.
The rig has to be very light in weight or they won&#39;t like uphauling it on the narrower and more "tippy" Starsurfer S.
You wife should be right at home on this board after sailing the Astro Rock.
Hope this helps,
&#92;